Boat



M. RAVEAU Aug. 29, 1950 BOAT Filed Feb. 24, 1948 2 Sheets-Sheet 1 INVENTOR. MARCEL PAvEAu Aug. 29, 1950 M. RAVEAU 2,520,782

BOAT Filed Feb. 24, 1948 2 Sheets-Sheet 2 fzgJE. $51 40 F 7 JNVEN TOR.

MARCEL RAVEZAU Amway Patented Aug. 29, 1950 UNITED STATES PATENT OFFICE BOAT Marcel Raveau, Lindenhurst, N. Y.

Application February 24, 1948, Serial No. 10,439

3 Claims. (01. 96)

This invention relates to new and useful improvements in a boat.

An object of the present invention is to provide a boat of the semi-round bottom outboard motor type, the bottom of which is formed of double layer material and the sides of which are formed of a single layer of material such as plywood or resinous plastic material which ordinarily cannot be bent about two axes normal to each claims in which the various novel features of the invention are more particularly set forth.

In the accompanying drawings forming a material part of this disclosure:

Fig. 1 is a perspective view of a boat constructed in accordance with the present invention.

Fig. 2 is a rear view of the boat.

Fig. 3 is an inverted view of the boat, taken from the rear, in perspective.

Fig. 4 is a side view of the boat.

Fig. 5 is an inverted view of the frame of the boat, taken from the prow, in perspective.

Fig. 6 is an inverted view of the frame of the boat in side elevation.

Fig. 7 is a view, taken on the line 1-1 of Fig. 6, with the longitudinal frame pieces omitted.

Fig. 8 is an outside viewof a chine.

Fig. 9 is a view of the right end of the chine.

Fig. 10 is a view of the left end of the chine.

Fig. 11 is an side view of the chine.

Fig. 12 is a plan view of superimposed sheets of plywood marked for cutting to form the bottom and portions of the sides of the boat.

Fig. 13 is a view of a sheet of plywood from which the remainder of the sides is made.

Fig. 14 is a partial enlarged sectional view of the completed boat taken on the line I4-I4 of Fig. 3.

The frame I 0 of the boat II, constructed in accordance with this invention, may be best viewed in Fig. 5. It consists'of a stern transom I2, preferably of one piece of oak or other suitable wood. A keelson I3 is grooved in the center of the bottom edge of the stern I2 and is jointed to a stem piece I4 which forms the prow of the boat. The stem piece is triangular in cross section with its base forming a. continuation of the top or inner face of the keelson. The keelson is fiat but the stem piece curves forwardly and upwardly to define the height of the prow of the boat.

The boat has three ribs of general U-shape. The forward rib I5 closest to the stem piece is narrow and deeply curved; the intermediate rib I6 is wider and shallower; and the rear rib I1 is wider still. .Each rib is formed of a bottom piece and two side pieces connected thereto. For example, reference may be had to rib I'I shown in Fig. 7. It consists of a bottom piece Ila and side pieces Ilb. The bottom piece Ila is curved and the side pieces are straight and converge upwardly and inwardly. Each side piece is mortised to its end of the bottom piece and the joint is reinforced by a cover cleat I8. The connections may be made with waterproof glue such as weldwood glue and reinforced with copper or brass nails or rivets or screws as desired.

Ribs I5 and I6 are of conventional construction and have center grooves for the passage therethrough of the keelson in the usual manner. Rib I! has a similar groove indicated at I9 in Fig. 7. The ribs, stem piece and stern are connected by two gunwales 20; the ribs having grooves 2|, see Fig. '7, for the gunwales and the stern I2 having similar grooves. The two gunwales meet nicely at the stem piece in a tapered point. Beneath the gunwales are longitudinal chines 22 which are connected similar to the gunwales. The chines are best shown as raw stock in Figs. 8 and 11. Each chine may be described as having a base 23, rectangular in cross section, a little more than half of the rear end portion thereof also having a triangular portion 24 superposed integrally on the base. Thus it differs from a conventional chine which usually has only'four sides, one of which may be inclined. The instant chine at its forward end has an inner side 25, an outer side 26 and connecting edges 21 and 28. At its rear end it has the innernormal, that is,-.it has no bulge. i

be seen from the inverted view of Fig. 5. They are set in grooves in the ribs and stern. The rib grooves are at the joints of the bottom and side pieces and in the reinforcing cleats. This can be seen, for example, in Fig. 7, wherein the chine groove 32 is cut in the cleat l8 and also runs through the overlapping portions of the bottom and side pieces of the ribs. cated in the dotted lines in Fig. '7.

As thus far described, the frame is more or less conventional except for the specific shape of the chines. It may be made by well known conventional rules of small boat construction, such as, for example, making the stem piece of laminations, that is, of plywood.

The frame further includes, as integral parts of the bottom piece Ila of the rib ll, two depending bulges 33. The normal line of the rib is indicated in dotdash lines in Fig. 7. The bulges 33 are each a convex extension, tapering into the ribbottom piece at its ends and being extended the farthest at itscenterrr. There is a bulge 33 on each side of thexkeelson. Each bulge includes agroove .34 at its deepest or center point: The frame further includes two longitudinal short ribs 35. Each rib 'afizisrgrooved into the stern l2 at its; rear end; :fits ,in its correlated groove 34 in its bulge 33 and is grooved into the rib l6; It .doesi'not extendbeyond-therib is and rib i 5 is "The-importance of the bulges :33 can bestbe seen byviewing Fig; 1'5, wherein it will beseen that thelrearend' of each rib 35 is in the normal curve line between'the-keelson i3 and the chineZZ, and this also trueofits forward end-- At'its center, however, it-is forced below the normal curve line bythe adjacent bulge 33.

.The frame. is covered by flat plywood or resinous plastic material. Superimposed sheets of material 36, see Fig. 12, are out along the lines 211101.138 and separately shaped and then placed on the keelson and attached thereto as by gluing and riveting; The lines 3! and 38 follow the stem piece'andrform-the prow. 'The outer edges 38' overlap the. chines and are fastened thereto.

, One-half of the chine is covered. For example,

The overlap is indithe same fashion as a keel protects the bottom of most outboard boats. The remainder of the boat is finished, seated and decked in the usual manner.

The position of the bulges is important. They are about half way between the stern I2 and the center of the boat. This is the part of the boat that remains in contact with the water, especially at high speeds. Even at high speeds the boat will not slap up and down; or porpoise as it is commonly called, the bulges preventing this and vkeeping the boat substantially level regardless of *pieces of plywood, a strong plywood having a thickness of A1 or of an inch is chosen so that whenthebottoms are. combined the finished bottom will be /2 or inch thick giving the finished bottom the .correctzstrength forisupporting weight and for resisting blows such as hittingrocks head on or dragging over rocks. The sides above the side portions provided by the bottom can be lighter plywood; That is, .sh'eet All can be a single sheet of Ti; or' h inch plywood.

.Forming the bottom of theboat of superimposed layers of material produces a boat having an extremely strong bottom, and yet 'the'layers can-be individually shaped making it easier to shape the bottomportio'n than if the bottom were formed of a single layer of material having the same thickness as the combined layers.

. If the bottom had only one bulge in the center then when the boat made a turn and banked, half of the bulge would be ineffective. In the instant'boat, regardless of the degree of banking, one'bulge is fully under water; This is important in racing a close-course around buoys.

. The seam batten inside and the fins or skegs seen that-thesheets 36 form the entire bottom 7 and a portion of each'side up to the chines.

The sheets 36', since they cover the entire bottom, provide a' perfectly smooth egg-like surface which is excellent for planing, see Fig. 3. The

sheets 36 are securely fastened to the keelson, ribs, stern, chines and stem piece. The, sheets arelvery securely fastened to-the ribs 35 after provide asafety featureduring planing and turn ing -andprotectthe bottom of the boat much l:

outside'help to give a flowing curve to the bulges. The two bulges on the bottom give a'lift to the boat without forming any water or air disturbance directly in the front of the propeller of the outboard motor, not shown, which is very important on fast boats as thepropeller is able to thus get a continuous stream of water. Boats equipped with these bulges are able to carry a heavy load with very little loss of speed.

While I have illustrated and described the preferred embodiment of my invention, it is to be understoodthatl do not limit myself to the preoise constructions herein disclosed and the right is reserved to all changes and modifications coming Within the scope of the invention as defined in the appended claims. Having thus described my invention, what I claim as new,'and desire to secure by United States Letters Patent is: 7 l

1; In aboat having a stern transom and a pair of spacedtransverse'ribs forward of the transom and extended parallel thereto, a keelson connecting'the transom and the ribs along the longitudinal center of the boat, one of the transverse ribs being located substantially midway between the transom and the other rib and having depending bulges on opposite sides of the. keelson and spaced therefrom, short ribs extendof -the. one rib, asheet covering the bottom of 3 the boat, said sheet being bulged downwardly son from the transom and across the one rib to convexly over the bulges of said short ribs. the other rib, said short ribs being bulged inter- 2- In b havin a St rn r nsom n a pail mediate of their ends downward over the bulges of spaced transverse ribs forward of the transom" f of the one rib, a sheet covering the bottom of the and extended p le thereto. & so 5 boat, said sheet being bulged downwardly connecting the om d e ri s 8110 the 91 E vexly over the bulges of said short ribs, and runtudinal center of the boat, one of the transverse ners secured to the outer face of said sheet parribs being located substantially midway between allel to and coextensive with said short ribs, said the transom and the other rib and having de runners being bulged downward over the downpending bulges on opposite sides of the keelson 10' wardly bulged areas of said sheet.

and spaced therefrom, short ribs extending lon gitudinally on opposite sides of the keelson from MARCEL RAVEAU.

the transom and across the one rib to the other rib, said short ribs being bulged intermediate o REFERENCES CITED their ends downward over the bulges of the one 15 f rib, a sheet covering the bottom of the boat, said?" 5 355 erences are of record m the sheet being bulged downwardly convexly over,

the bulges of said short ribs, and runners securedi UNITED STATES PATENTS to the outer face of said sheet parallel to and Number Name Date coextensive with said short ribs. 29 1,572,976 Huene Feb. 16, 1926 8. In a boat having a stern transom and a pair 1,848,502 Seaman Mar. 8. 1932 of spaced transverse ribs forward of the transom 1,880,366 Smedley Oct. 4, 1932 and extended parallel thereto, a keelson con 1,898,876 'Heljesson Feb. 21, 1933 necting the transom and the ribs along the lon- 2,165,545 Grant July 11, 1939 gitudinal center of the boat, one of the trans' 25 2,220,875 Barker et a1. Nov. 12, 1940 verse ribs being located substantially midway 2,422,818 Bamberger June 24, 1947 between the transom and the other rib and having depending bulges on opposite sides of the FOREIGN PATENTS keelson and spaced therefrom, short ribs extend- Number Country Date ing longitudinally on opposite sides 01' the keel- 4,695 Great Britain 1889 

